Reintegrate mock driver

[flimzy]

No description provided.

[codecov]

Codecov Report

Patch coverage: 76.78% and project coverage change: -4.44% ⚠️

Comparison is base (63c8b8d) 88.27% compared to head (1b235a6) 83.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #680      +/-   ##
==========================================
- Coverage   88.27%   83.84%   -4.44%     
==========================================
  Files          62       86      +24     
  Lines        5857     9536    +3679     
==========================================
+ Hits         5170     7995    +2825     
- Misses        576     1331     +755     
- Partials      111      210      +99     

Files Changed	Coverage Δ
mockdb/gen/main.go	30.88% <30.88%> (ø)
mockdb/gen/render.go	55.68% <55.68%> (ø)
mockdb/clientexpectations_gen.go	59.26% <59.26%> (ø)
mockdb/dbexpectations_gen.go	62.51% <62.51%> (ø)
mockdb/driver.go	69.23% <69.23%> (ø)
mockdb/helpers.go	73.33% <73.33%> (ø)
mockdb/client_gen.go	80.21% <80.21%> (ø)
mockdb/common.go	80.76% <80.76%> (ø)
mockdb/updates.go	80.76% <80.76%> (ø)
mockdb/db_gen.go	81.81% <81.81%> (ø)
... and 14 more

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